@Sowjanya PONNADA if you first carry out a PSC key word search  you'll get the answer ( try 'GenAI how to activate assistant') 

For example this question.

You also already have access to the documentation server:

What's new in Pega GenAI '24.2

Integrating client-managed deployments with Pega GenAI

Enabling Pega GenAI in Pega Cloud

And there is info on the Pega Academy site:

Implementation of Pega GenAI

To summarize:

Pega GenAI capabilities are available for on-premises clients, but they must connect to Pega Cloud using Pega PremBridge to utilize Pega GenAI services. Here are the steps to set it up:

1. Contact Your Pega Account Executive: Start by reaching out to your Pega account representative to discuss your needs and the prerequisites for enabling Pega GenAI.
2. Use Pega PremBridge: Ensure that you have Pega PremBridge, which is required for on-premises or client-managed cloud deployments to access Pega GenAI services.
3. Complete Required Configuration: The user portal of the Pega PremBridge application will provide options for your Pega GenAI gateway URL and other necessary configuration information.
4. Sign the Pega GenAI Addendum: You will need to sign the Pega GenAI addendum to proceed with the setup.
5. Deploy Necessary Infrastructure: After completing the formalities, the Pega Cloud Ops team will deploy the necessary infrastructure to activate Pega GenAI capabilities.

For more detailed information, you can refer to the resources on enabling Pega GenAI in Pega Cloud.